Preparing gas for preserving food



(NoMode1.)'

E. R. MQUALL..

PREPARING GAS POR PRBSBRVING P001). l No. 252,787. Patented Ja,11.24,l882.

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Nrrnn STATES ATENT Ormea..

EDVIN It. MOGALL, OF LOCKPORT, NEW YORK.

PREPARING GAS FOR PRESERVING FOOD.'

SPECIFICATION forming part of LettersiPatent No. 252,787, dated January 24, 1882.

' Application tiled December 24,1881. (No model.)

To all whom it may concern:

Be it known that I, EDWIN R. MCOALL, of Lockport, Niagara county, State of New York, have invented an Improvement in Means for Preserving Food; and I do hereby declare the following is a full, clear, and exact description ofthe same.

A represents a vertical longitudinal section of the retort or furnace, B, the receiving and exhaust gasorneter; C, a cylindrical purifier; I), a storage and controlling gasometer, the latter acting as a means for returning the gas through puritier to the gasometcr lirstnatned. These are connected by suitable pipes having controlling cocks or valves.v

This improvement relates to a novel means for rapidly generating and purifying, to any desired degree, gas or gases to be applied to the preservation of foods and other organic substances.

A represents a cylindrical furnace, having inner wall, a., which extends nearly to the top, and is composed of tire-brick. Between this and the outer casing is a tilling composed of any refractory material which will serve as a nou-conductor of heat. This furnace has at its top a man hole closed by an ordinary retortcover, which, when in use, is securely' clamped thereon. At the foot of this furnace is an airinlet pipe eonnectedwith blast-fan. An iron door falling downward serves to remove cinders and ashes. A pipe, a, serves as au exit or waste pipe.

a is the conveying-pipe, opening into gas ometer B, and is provided with a cock for restraining the gas until in proper condition.

Gasometer B is of the ordinary construction, except that it is provided with means for increasing and decreasing pressure upon the gasoineter.

The puritier G may be cylindrical or square in form. It is connected with gasometer B by three pipes, which enter at the top, the center one of which,c, reaches nearly to the bottom. Itis-provided also with wire-gauze diaphragms c. 'hen in use it is filled with mill; of lime or any suitable liquid purifying substance known to science which will serve as a purifying agent.

Gasometer D is of similar construction to the receiving-gasometer B, and is connected with preserving-chambers by a suitable pipe or pipes.

When in use the furnace is filled with coke, and the tire being lighted, a blast is turned on. The green gas is at irst allowed to escape. The escape -pipe is then closed, blast continued, and the gases caused to pass into the reecivingfgasometcr. They may here be stored. A suction is caused upon the furnace by traction applied to the top of this gasometer. From this chamber the gas passes either directly to gasometer D or through the puritcient length to cause energetic agitation of the milk of lime or other puri t'y ing agent and obviate any tendency to settle, and thus eliiciently separate the impurities.

I am aware that it is not new to place a re'- tort in direct connection with a gasometer containing water through which the entering gas is caused to pass, and also that itis not new to wash illuminating-gas with lime-water.

Having thus described my invention, what I claim, and desire to secure. by Letters` Patent, is- I 1. The furnace A, in combination with receiving and exhaust gasometer B and purifier C, provided with perforated diaphragins cand central inlet-pipe, as specified.

The combination consisting of gasometers B I)V with purifier C, locatedv between the two, the latter serving lor repeated passage of the gas and its efficient purilication, as set forth. t

3. The combination of furnace A, gasometer B, and purifier l, having the central dip-pipe and diaphragms stated, 'with gasometer D, in the order and for the purposes hereinbefore set forth.

In witness whereof I have hereunto signed myname in the presence of two witnesses.

EDWIN R. MCUALL.

Witnesses:

T. HALL HENEss, SAML. T. DRURY.

IOO 

